Alum 40 02 Bottle

[Jonny Wishbone]

For those of you that use an Alum 40 for 02 stage or deco. When you get fills of 100% , what psi do get? Do you usually just get a trans fill from a large bottle or bank from your LDS to the 2000ish psi or does your LDS use a booster and get you to 3000 or are you good with 2000ish psi? I know that with anything less than 100% it can be topped off with 02 compatible air from their air bank to get you to 3000. Wanted an informal survey of what is happening out there.

 

[rjack321]

Booster at home normally but sometimes I only need 1800-2000 so I don't bother boosting. The less I rebuild my booster the better.
Every competent "tech" shop I know and/or recommend has a booster in 2019.

 

[RyanT]

On occasion one of my shops has had a problem with their booster and I've only been able to get around 2k. The shops I frequent are pretty reliable though and it's usually 3k.

 

[PfcAJ]

Usually 2000-2500.

Truth be told, 2k is good enough for most dives.

 

[rjack321]

Usually 2000-2500.

Truth be told, 2k is good enough for most dives.

I would never top with air just to get 3K, what a waste.

 

[PfcAJ]

I would never top with air just to get 3K, what a waste.

That would be like showing up with dog dirt on your shoe.

 

[rhwestfall]

yep..
Just playing with this calculator to see if you started with 2400 psi of 99% O2, and had access to 32% banked, what you could get....

This is about the best you could achieve as it crashes without adding a whole bunch more 02..

YMMV

 

[rhwestfall]

here is if you hve 36% to top off...

bored, and just playing with this calculator.....

YMMV

 

[rhwestfall]

now, what does this do to your accelerated deco?

 

[Tug]

Most shops that I get fills at have boosters so I usually get a consistent 3000ish. Like others have said, you very rarely needed that much but I liked it because I wouldn’t need to get it filled if I was doing multiple 90-130’ dives in a weekend.